吴裕雄--天生自然轻量级JAVA EE企业应用开发Struts2Sping4Hibernate整合开发学习笔记：Spring_Around

<?xml version="1.0" encoding="GBK"?>
<project name="spring" basedir="." default="">
    <property name="src" value="src"/>
    <property name="dest" value="classes"/>

    <path id="classpath">
        <fileset dir="../../lib">
            <include name="**/*.jar"/>
        </fileset>
        <pathelement path="${dest}"/>
    </path>

    <target name="compile" description="Compile all source code">
        <delete dir="${dest}"/>
        <mkdir dir="${dest}"/>
        <copy todir="${dest}">
            <fileset dir="${src}">
                <exclude name="**/*.java"/>
            </fileset>        
        </copy>
        <javac destdir="${dest}" debug="true" includeantruntime="yes"
            deprecation="false" optimize="false" failonerror="true">
            <src path="${src}"/>
            <classpath refid="classpath"/>
            <compilerarg value="-Xlint:deprecation"/>
        </javac>
    </target>

    <target name="run" description="Run the main class" depends="compile">
        <java classname="lee.BeanTest" fork="yes" failonerror="true">
            <classpath refid="classpath"/>
        </java>
    </target>

</project>

<?xml version="1.0" encoding="GBK"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">
    <!-- 指定自动搜索Bean组件、自动搜索切面类 -->
    <context:component-scan base-package="org.crazyit.app.service
        ,org.crazyit.app.aspect">
        <context:include-filter type="annotation"
            expression="org.aspectj.lang.annotation.Aspect"/>
    </context:component-scan>
    <!-- 启动@AspectJ支持 -->
    <aop:aspectj-autoproxy/>
</beans>

package lee;

import org.springframework.context.*;
import org.springframework.context.support.*;

import org.crazyit.app.service.*;
/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public class BeanTest
{
    public static void main(String[] args)
    {
        // 创建Spring容器
        ApplicationContext ctx = new
            ClassPathXmlApplicationContext("beans.xml");
        Hello hello = ctx.getBean("hello" , Hello.class);
        hello.foo();
        System.out.println("addUser()的返回值为："
            + hello.addUser("孙悟空" , "7788"));
        World world = ctx.getBean("world" , World.class);
        world.bar();
    }
}

package org.crazyit.app.aspect;

import org.aspectj.lang.annotation.*;
import org.aspectj.lang.*;

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
// 定义一个切面
@Aspect
public class TxAspect
{
    // 匹配org.crazyit.app.service.impl包下所有类的、
    // 所有方法的执行作为切入点
    @Around("execution(* org.crazyit.app.service.impl.*.*(..))")
    public Object processTx(ProceedingJoinPoint jp)
        throws java.lang.Throwable
    {
        System.out.println("执行目标方法之前，模拟开始事务...");
        // 获取目标方法原始的调用参数
        Object[] args = jp.getArgs();
        if(args != null && args.length > 1)
        {
            // 修改目标方法的第一个参数
            args[0] = "【增加的前缀】" + args[0];
        }
        // 以改变后的参数去执行目标方法，并保存目标方法执行后的返回值
        Object rvt = jp.proceed(args);
        System.out.println("执行目标方法之后，模拟结束事务...");
        // 如果rvt的类型是Integer，将rvt改为它的平方
        if(rvt != null && rvt instanceof Integer)
            rvt = (Integer)rvt * (Integer)rvt;
        return rvt;
    }
}

package org.crazyit.app.service;

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author Yeeku.H.Lee kongyeeku@163.com
 * @version 1.0
 */
public interface Hello
{
    // 定义一个简单方法，模拟应用中的业务逻辑方法
    void foo();
    // 定义一个addUser()方法，模拟应用中的添加用户的方法
    int addUser(String name , String pass);
}

package org.crazyit.app.service;

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author Yeeku.H.Lee kongyeeku@163.com
 * @version 1.0
 */
public interface World
{
    // 定义一个简单方法，模拟应用中的业务逻辑方法
    public void bar();
}

package org.crazyit.app.service.impl;

import org.springframework.stereotype.Component;

import org.crazyit.app.service.*;
/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author Yeeku.H.Lee kongyeeku@163.com
 * @version 1.0
 */
@Component("hello")
public class HelloImpl implements Hello
{
    // 定义一个简单方法，模拟应用中的业务逻辑方法
    public void foo()
    {
        System.out.println("执行Hello组件的foo()方法");
    }
    // 定义一个addUser()方法，模拟应用中的添加用户的方法
    public int addUser(String name , String pass)
    {
        System.out.println("执行Hello组件的addUser添加用户：" + name);
        return 20;
    }
}

package org.crazyit.app.service.impl;

import org.springframework.stereotype.Component;
import org.crazyit.app.service.*;
/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author Yeeku.H.Lee kongyeeku@163.com
 * @version 1.0
 */
@Component("world")
public class WorldImpl implements World
{
    // 定义一个简单方法，模拟应用中的业务逻辑方法
    public void bar()
    {
        System.out.println("执行World组件的bar()方法");
    }
}